01. Which three factors should be considered when implementing a Layer 2 protocol in a network? (Choose three.

) the Layer 3 protocol selected the geographic scope of the network the PDU defined by the transport layer the physical layer implementation the number of hosts to be interconnected

y y y y y

02.

Refer to the exhibit. Assuming that the network in the exhibit is converged meaning the routing tables and ARP tables are complete, which MAC address will Host A place in the destination address field of Ethernet frames destined for www.server?
y y y y

What is true concerning physical and logical topologies?
y
y
y
y
The logical topology is always the same as the physical topology.
.03. Physical signal paths are defined by Data Link layer protocols.)
y y y y y y
non-deterministic less overhead one station transmits at a time collisions exist devices must wait their turn token passing
04. Which options are properties of contention-based media access for a shared media? (Choose three. Logical topologies consist of virtual connections between nodes. Physical topologies are concerned with how a network transfers frames.

) y Layer 2 may identify devices by a physical address burned into the network card y Layer 2 identifies the applications that are communicating y Layer 3 represents a hierarchical addressing scheme y Layer 4 directs communication to the proper destination network y Layer 4 addresses are used by intermediary devices to forward data
. What is this type of drawing? y logical topology y physical topology y cable path y wiring grid y access topology 09. What statements are true regarding addresses found at each layer of the OSI model? (Choose two.What is the purpose of the preamble in an Ethernet frame? y is used as a padding for data y is used for timing synchronization y is used to identify the source address y is used to identify the destination address 10.08. A network administrator has been asked to provide a graphic representation of exactly where the company network wiring and equipment are located in the building.

y Network 2 uses CSMA/CA and Network 3 uses CSMA/CD. 12. y Network 1 uses CSMA/CD and Network 3 uses CSMA/CA. y Network 1 uses CSMA/CA and Network 2 uses CSMA/CD. How many CRC calculations will take place as traffic routes from the PC to the laptop? y 1 y 2 y 4 y 6 y 8 y 16
.Refer to the exhibit. Which statement describes the media access control methods that are used by the networks in the exhibit? y All three networks use CSMA/CA y None of the networks require media access control.
Refer to the exhibit.

Refer to the exhibit. A frame is being sent from the PC to the laptop.13.) y source MAC ² PC y source MAC ² S0/0 on RouterA y source MAC ² Fa0/1 on RouterB y source IP ² PC y source IP ² S0/0 on RouterA y source IP ² Fa0/1 of RouterB 14. Which source MAC and IP addresses will be included in the frame as it leaves RouterB? (Choose two. Which sublayer of the data link layer prepares a signal to be transmitted at the physical layer? y LLC y MAC y HDLC y NIC
.

The Layer 3 address must be reassigned to allow communications to the new network. The device will still operate at the same Layer 2 address.
16.)
y y y y
y
The Layer 2 address must be reassigned. y The data link layer protocol used over the link requires a large frame header. What is a characteristic of a logical point-to-point topology? y The nodes are physically connected. Applications and services will need additional port numbers assigned.
. y The physical arrangement of the nodes is restricted. The default gateway address should not be changed.15. What two facts are true when a device is moved from one network or subnet to another? (Choose two. What is a function of the data link layer? y provides the formatting of data y provides end-to-end delivery of data between hosts y provides delivery of data between two applications y provides for the exchange data over a common local media 17. y The media access control protocol can be very simple.

What is the primary purpose of the trailer in a data link layer frame? y define the logical topology y provide media access control y support frame error detection y carry routing information for the frame 20. y They are considered physical addresses.) y They are 48 binary bits in length.
.18. y They consist of four eight-bit octets of binary numbers. y They must be changed when an Ethernet device is added or moved within the network. y They are generally represented in hexadecimal format. What is a primary purpose of encapsulating packets into frames? y provide routes across the internetwork y format the data for presentation to the user y facilitate the entry and exit of data on media y identify the services to which transported data is associated 19. y They are used to determine the data path through the network. What are three characteristics of valid Ethernet Layer 2 addresses? (Choose three.